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Chemistry LibreTexts

A. Electrochemical Thermodynamics

Electrochemistry can be defined as the study of phenomena at electrified interfaces.1 As such, two things are fundamental to electrochemical measurements:

  1. Interface: boundary between two distinct, chemically different phases
  2. Electric field: existing across the interface

Generally, the interface occurs between a metallic conductor (the electrode) and a fluid, ionic conductor (the solution). The electric field usually results as a consequence of contact between a solid electrode and the solution. In electrochemistry, the electric field is most often one that is under user control, for example by utilizing a device called a potentiostat, which will be discussed in a later section.